| Project/Area Number |
25870347
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Astronomy
Particle/Nuclear/Cosmic ray/Astro physics
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| Research Institution | Kyoto University |
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Principal Investigator |
TANAKA Takaaki 京都大学, 理学(系)研究科(研究院), 助教 (20600406)
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| Research Collaborator |
MATSUMURA Hideaki
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| Project Period (FY) |
2013-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2014: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2013: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Keywords | 高エネルギー宇宙物理 / X線天文 / 半導体検出器 / 放射線計測 / X線天文学 |
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| Outline of Final Research Achievements |
We aim to reveal how cosmic rays are accelerated in shocks of supernova remnants. Hard X-ray polarimetry with superior sensitivity is one of the promising methods for the purpose. Semiconductor pixel sensors with good energy resolution is a key technology to realise such observations. We have been developing SOIPIX, active pixel sensors based on a Silicon-On-Isulator (SOI) technology. In this research, we successfully improved their energy resolution by amplifying signals in the early stage of the signal processing. The achieved energy resolution is 300 eV (FWHM) for 5.9-keV X-rays. We also improved charge collection efficiency of our sensors, which should be high enough to achieve even better energy resolution. We identified why our previous devices have lower charge collection efficiency.
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